During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.

“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）

Using a file without a handle may result in （）

（） is not installed on the main switchboar.

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

Cold weather starting of a diesel engine may be made easier by（）

（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.

Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）